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Although neurons that co-express kisspeptin, neurokinin B, and dynorphin (KNDy cells) were recently defined as the GnRH\/LH pulse generator, little is understood about their role in the pathogenesis of PCOS. We used a prenatal androgen-treated (PNA) mouse model of PCOS to determine whether changes in KNDy neurons or their afferent network underlie altered negative feedback. First, we identified elevated androgen receptor gene expression in KNDy cells of PNA mice, whereas progesterone receptor and dynorphin gene expression was significantly reduced, suggesting elevated androgens in PCOS disrupt progesterone negative feedback via direct actions upon KNDy cells. Second, we discovered GABAergic and glutamatergic synaptic input to KNDy neurons was reduced in PNA mice. Retrograde monosynaptic tract-tracing revealed a dramatic reduction in input originates from sexually dimorphic afferents in the preoptic area, anteroventral periventricular nucleus, anterior hypothalamic area and lateral hypothalamus. These results reveal 2 sites of neuronal alterations potentially responsible for defects in negative feedback in PCOS: changes in gene expression within KNDy neurons, and changes in synaptic inputs from steroid hormone-responsive hypothalamic regions. How each of these changes contribute to the neuroendocrine phenotype seen in in PCOS, and the role of specific sets of upstream KNDy afferents in the process, remains to be determined.<\/jats:p>","DOI":"10.1210\/endocr\/bqab158","type":"journal-article","created":{"date-parts":[[2021,8,4]],"date-time":"2021-08-04T12:10:35Z","timestamp":1628079035000},"source":"Crossref","is-referenced-by-count":63,"title":["Prenatal Androgen Exposure Alters KNDy Neurons and Their Afferent Network in a Model of Polycystic Ovarian Syndrome"],"prefix":"10.1210","volume":"162","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8675-8271","authenticated-orcid":false,"given":"Aleisha M","family":"Moore","sequence":"first","affiliation":[{"name":"Department of Biological Sciences, Kent State University, Kent, OH 44242, USA"},{"name":"Brain Health Research Institute, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dayanara B","family":"Lohr","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Kent State University, Kent, OH 44242, USA"},{"name":"Brain Health Research Institute, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lique M","family":"Coolen","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Kent State University, Kent, OH 44242, USA"},{"name":"Brain Health Research Institute, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael N","family":"Lehman","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, Kent State University, Kent, OH 44242, USA"},{"name":"Brain Health Research Institute, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"80","published-online":{"date-parts":[[2021,8,4]]},"reference":[{"issue":"5","key":"2021101307532852500_CIT0001","doi-asserted-by":"crossref","first-page":"487","DOI":"10.1210\/er.2015-1018","article-title":"Scientific statement on the diagnostic criteria, epidemiology, pathophysiology, and molecular genetics of polycystic ovary syndrome","volume":"36","author":"Dumesic","year":"2015","journal-title":"Endocr Rev."},{"issue":"1","key":"2021101307532852500_CIT0002","doi-asserted-by":"crossref","first-page":"6","DOI":"10.1016\/j.fertnstert.2016.05.003","article-title":"Criteria, prevalence, and phenotypes of polycystic ovary syndrome","volume":"106","author":"Lizneva","year":"2016","journal-title":"Fertil Steril."},{"issue":"2","key":"2021101307532852500_CIT0003","doi-asserted-by":"crossref","first-page":"388","DOI":"10.1093\/humrep\/dey363","article-title":"Erratum. 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